Q. No.Sexual reproduction takes place through non flagellated gametes that are similar in size in:
1.
Ulothrix
2.
Spirogyra
3.
Volvox
4.
Fucus
Female sex organs of gymnosperms are called:
| 1. | Archegonia | 2. | Female strobili |
| 3. | Megasporangium | 4. | Megasporophyll |
Identify the incorrect statement regarding algae:
| 1. | Algae contain chlorophyll |
| 2. | Algae are autotrophic |
| 3. | Body of an alga is composed of pseudoparenchyma and hyphae |
| 4. | Cell wall of an alga is composed of true cellulose. |
The given diagram shows:
1. Female thallus of Marchantia
2. Male thallus of Marchantia
3. Female thallus of Funaria
4. Male thallus of Funaria
Consider the following two statements:
| I: | The spread of living pteridophytes is restricted to narrow geographical regions |
| II: | They are the first terrestrial plants to possess vascular tissues |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is true but II is false
4. I is false but II is true
Consider the following two statements:
| I: | In Selaginella and Salvia, development of zygotes into young embryos takes place within the female gametophyte. |
| II: | Selaginella and Salvia are homosporous pteridophytes |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is true but II is false
4. I is false but II is true
In gymnosperms, the ovules are:
| 1. | not enclosed by any ovary wall before and after fertilization |
| 2. | not enclosed by any ovary wall only before fertilization |
| 3. | not enclosed by any ovary wall only after fertilization |
| 4. | enclosed by an ovary wall before and after fertilization |
Coralloid roots in Cycas are associated with nitrogen fixing:
| 1. | Rhizobium | 2. | Frankia |
| 3. | Azospirillum | 4. | Cyanobacteria |
All the following regarding Pinus are correct except:
1. Obligate association with mycorrhiza
2. Unbranched stems
3. Male and female strobili on the same plant
4. Leaves in fascicles
Identify the incorrect statement:
| 1. | As compared to the bryophytes, pteridophytes have sporophyte as the main plant body |
| 2. | Pteridophyte sporophyte has well differentiated true roots, stem and leaves |
| 3. | Selaginella has macrophylls like ferns |
| 4. | In sporophyte of ferns, leaf-like appendages called sporophylls subtend sporangia |
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